National Petrographic's network of consulting material testing specialists have been providing prompt professional service in areas of construction materials, forensic study of concrete components & structures, concrete repair and restoration, research & development, expert witness, & seminars on cement and concrete. Our clients include State Departments of Transportation, contractors, architect firms, engineer firms, universities, and private research organizations. Using petrographic analysis, scanning electron microscopy, XRD, chemical analysis, and other analytical methods, reporting findings on your projects is prompt, professional, and reliable.